<?php

/*
+--------------------------------------------------------------------------
|   Invision Power Board v1.3.1 Final
|   ========================================
|   by Matthew Mecham
|   (c) 2001 - 2003 Invision Power Services
|   http://www.invisionpower.com
|   ========================================
|   Web: http://www.invisionboard.com
|   Time: Wed, 07 Apr 2004 17:52:30 GMT
|   Release: 411d23a22eab78acc546ab549077d3ff
|   Email: matt@invisionpower.com
|   Licence Info: http://www.invisionboard.com/?license
+---------------------------------------------------------------------------
|
|   > mySQL DB abstraction module
|   > Module written by Matt Mecham
|   > Code formatting by Eric Hendrickson
|   > Date started: 14th February 2002
|
|	> Module Version Number: 1.0.0
+--------------------------------------------------------------------------
*/

class MySQLDriver 
{
	var $obj = array ( 
									 "sql_database"   => ""         ,
									 "sql_user"       => "root"     ,
									 "sql_pass"       => ""         ,
									 "sql_host"       => "localhost",
									 "sql_port"       => ""         ,
									 "persistent"     => "0"         ,
									 "sql_tbl_prefix"        => ""      ,
									 "cached_queries" => array(),
									 'debug'          => 0,
								 );
								 
	var $query_id      = "";
	var $connection_id = "";
	var $query_count   = 0;
	var $record_row    = array();
	var $return_die    = 0;
	var $error         = "";
	var $failed        = 0;
							
							 
	function connect() 
	/*========================================================================*/
	// Connect to the database                 
	/*========================================================================*/  
	{
	if ($this->obj['persistent'])
	{
			$this->connection_id = mysql_pconnect( $this->obj['sql_host'] ,
											 $this->obj['sql_user'] ,
											 $this->obj['sql_pass'] 
										);
	}
	else
	{
		$this->connection_id = mysql_connect( $this->obj['sql_host'] ,
												$this->obj['sql_user'] ,
												$this->obj['sql_pass'] 
											);
	}
	if ( !mysql_select_db($this->obj['sql_database'], $this->connection_id) )
	{
		echo ("ERROR: Cannot find database ".$this->obj['sql_database']);
	}
	}
	
	function query($the_query, $bypass=0) 
	/*========================================================================*/
	// Process a query
	/*========================================================================*/
	{
		//--------------------------------------
		// Change the table prefix if needed
		//--------------------------------------
			
		if ($bypass != 1)
		{
			if ($this->obj['sql_tbl_prefix'] != "ibf_")
			{
				 $the_query = preg_replace("/ibf_(\S+?)([\s\.,]|$)/", $this->obj['sql_tbl_prefix']."\\1\\2", $the_query);
			}
		}
		
		if ($this->obj['debug'])
		{
			global $Debug, $ibforums;
			$Debug->startTimer();
		}
		
		$this->query_id = mysql_query($the_query, $this->connection_id);
		
		if (! $this->query_id )
		{
			$this->fatal_error("mySQL query error: $the_query");
		}
		
		if ($this->obj['debug'])
		{
			$endtime = $Debug->endTimer();
			
			if ( preg_match( "/^select/i", $the_query ) )
			{
				$eid = mysql_query("EXPLAIN $the_query", $this->connection_id);
				$ibforums->debug_html .= "<table width='95%' border='1' cellpadding='6' cellspacing='0' bgcolor='#FFE8F3' align='center'>
									 <tr>
										 <td colspan='8' style='font-size:14px' bgcolor='#FFC5Cb'><b>Select Query</b></td>
									 </tr>
									 <tr>
										<td colspan='8' style='font-family:courier, monaco, arial;font-size:14px;color:black'>$the_query</td>
									 </tr>
									 <tr bgcolor='#FFC5Cb'>
									 <td><b>table</b></td><td><b>type</b></td><td><b>possible_keys</b></td>
									 <td><b>key</b></td><td><b>key_len</b></td><td><b>ref</b></td>
									 <td><b>rows</b></td><td><b>Extra</b></td>
									 </tr>\n";
				
				while( $array = mysql_fetch_array($eid) )
				{
					$type_col = '#FFFFFF';
					
					if ($array['type'] == 'ref' or $array['type'] == 'eq_ref' or $array['type'] == 'const')
					{
						$type_col = '#D8FFD4';
					}
					else if ($array['type'] == 'ALL')
					{
						$type_col = '#FFEEBA';
					}
					
					$ibforums->debug_html .= "<tr bgcolor='#FFFFFF'>
											 <td>$array[table]&nbsp;</td>
											 <td bgcolor='$type_col'>$array[type]&nbsp;</td>
											 <td>$array[possible_keys]&nbsp;</td>
											 <td>$array[key]&nbsp;</td>
											 <td>$array[key_len]&nbsp;</td>
											 <td>$array[ref]&nbsp;</td>
											 <td>$array[rows]&nbsp;</td>
											 <td>$array[Extra]&nbsp;</td>
											 </tr>\n";
				}
				
				if ($endtime > 0.1)
				{
					$endtime = "<span style='color:red'><b>$endtime</b></span>";
				}
				
				$ibforums->debug_html .= "<tr>
											<td colspan='8' bgcolor='#FFD6DC' style='font-size:14px'><b>mySQL time</b>: $endtime</b></td>
											</tr>
											</table>\n<br />\n";
			}
			else
			{
				$ibforums->debug_html .= "<table width='95%' border='1' cellpadding='6' cellspacing='0' bgcolor='#FEFEFE'  align='center'>
										 <tr>
											<td style='font-size:14px' bgcolor='#EFEFEF'><b>Non Select Query</b></td>
										 </tr>
										 <tr>
											<td style='font-family:courier, monaco, arial;font-size:14px'>$the_query</td>
										 </tr>
										 <tr>
											<td style='font-size:14px' bgcolor='#EFEFEF'><b>mySQL time</b>: $endtime</span></td>
										 </tr>
										</table><br />\n\n";
			}
		}
		$this->query_count++;
		$this->obj['cached_queries'][] = $the_query;
		return $this->query_id;
	}
	
	function fetch_row($query_id = "") 
	/*========================================================================*/
	// Fetch a row based on the last query
	/*========================================================================*/
	{
		if ($query_id == "")
		{
			$query_id = $this->query_id;
		}
	
		$this->record_row = mysql_fetch_array($query_id, MYSQL_ASSOC);
		
		return $this->record_row;
	}
	
	function get_affected_rows() 
	/*========================================================================*/
	// Fetch the number of rows affected by the last query
	/*========================================================================*/
	{
		return mysql_affected_rows($this->connection_id);
	}
	
	function get_num_rows() 
	/*========================================================================*/
	// Fetch the number of rows in a result set
	/*========================================================================*/
	{
		return mysql_num_rows($this->query_id);
	}
	
	function get_insert_id() 
	/*========================================================================*/
	// Fetch the last insert id from an sql autoincrement
	/*========================================================================*/
	{
		return mysql_insert_id($this->connection_id);
	}  
	
	function get_query_cnt() 
	/*========================================================================*/
	// Return the amount of queries used
	/*========================================================================*/
	{
		return $this->query_count;
	}
	
	function free_result($query_id="") 
	/*========================================================================*/
	// Free the result set from mySQLs memory
	/*========================================================================*/
	{
		if ($query_id == "") {
			$query_id = $this->query_id;
		}
		
		@mysql_free_result($query_id);
	}
	
	function close_db() 
	/*========================================================================*/
	// Shut down the database
	/*========================================================================*/
	{ 
		return mysql_close($this->connection_id);
	}
	
	function get_table_names() 
	/*========================================================================*/
	// Return an array of tables
	/*========================================================================*/
	{
		$result     = mysql_list_tables($this->obj['sql_database']);
		$num_tables = @mysql_numrows($result);
		for ($i = 0; $i < $num_tables; $i++)
		{
			$tables[] = mysql_tablename($result, $i);
		}
		
		mysql_free_result($result);
		
		return $tables;
	}
	
	function get_result_fields($query_id="") 
	/*========================================================================*/
	// Return an array of fields
	/*========================================================================*/
	{
		if ($query_id == "")
		{
			$query_id = $this->query_id;
		}
	
		while ($field = mysql_fetch_field($query_id))
		{
			$Fields[] = $field;
		}
		
		return $Fields;
	}
	
	function fatal_error($the_error) 
	/*========================================================================*/
	// Basic error handler
	/*========================================================================
	{
		// Are we simply returning the error?
		if ($this->return_die == 1)
		{
			$this->error    = mysql_error();
			$this->error_no = mysql_errno();
			$this->failed   = 1;
			return;
		}
		else
		{
			$this->error    = mysql_error();
			$this->error_no = mysql_errno();
			$this->failed   = 1;
		}
		
		$the_error .= "\n\nmySQL error: ".mysql_error()."\n";
		$the_error .= "mySQL error code: ".$this->error_no."\n";
		$the_error .= "Date: ".date("l dS of F Y h:i:s A");
		
		$out = "<html><head><title>Database Error</title>
				 <style>P,BODY{ font-family:verdana,arial,sans-serif; font-size:11px; }</style></head><body>
				 &nbsp;<br><br><blockquote><b>There appears to be an error with the database.</b><br>
				 You can try to refresh the page by clicking <a href=\"javascript:window.location=window.location;\">here</a>, if this
				 does not fix the error, please contact the site administrator.
				 <br><br><b>Error Returned</b><br>
				 <form name='mysql'><textarea rows=\"15\" cols=\"60\">".htmlspecialchars($the_error)."</textarea></form><br>We apologise for any inconvenience</blockquote></body></html>";
		
		echo($out);
		die("");*/
	{
		throw new Exception();
	}
	
	function compile_db_insert_string($data) 
	/*========================================================================*/
	// Create an array from a multidimensional array returning formatted
	// strings ready to use in an INSERT query, saves having to manually format
	// the (INSERT INTO table) ('field', 'field', 'field') VALUES ('val', 'val')
	/*========================================================================*/
	{
		$field_names  = "";
		$field_values = "";
		
		foreach ($data as $k => $v)
		{
			$v = preg_replace( "/'/", "\\'", $v );
			//$v = preg_replace( "/#/", "\\#", $v );
			$field_names  .= "$k,";
			$field_values .= "'$v',";
		}
		
		$field_names  = preg_replace( "/,$/" , "" , $field_names  );
		$field_values = preg_replace( "/,$/" , "" , $field_values );
		
		return array( 'FIELD_NAMES'  => $field_names,
						'FIELD_VALUES' => $field_values,
					);
	}
	
	function compile_db_update_string($data) 
	/*========================================================================*/
	// Create an array from a multidimensional array returning a formatted
	// string ready to use in an UPDATE query, saves having to manually format
	// the FIELD='val', FIELD='val', FIELD='val'
	/*========================================================================*/
	{
		$return_string = "";
		
		foreach ($data as $k => $v)
		{
			$v = preg_replace( "/'/", "\\'", $v );
			$return_string .= $k . "='".$v."',";
		}
		
		$return_string = preg_replace( "/,$/" , "" , $return_string );
		
		return $return_string;
	}
	
	function field_exists($field, $table) 
	/*========================================================================*/
	// Test to see if a field exists by forcing and trapping an error.
	// It ain't pretty, but it do the job don't it, eh?
	// Return 1 for exists, 0 for not exists 
	// Fun fact: The number of times I spelt 'field' as 'feild'in this part: 104
	/*========================================================================*/
	{
		$this->return_die = 1;
		$this->error = "";
		
		$this->query("SELECT COUNT($field) as count FROM $table");
		
		$return = 1;
		
		if ( $this->failed )
		{
			$return = 0;
		}
		
		$this->error = "";
		$this->return_die = 0;
		$this->error_no   = 0;
		$this->failed     = 0;
		
		return $return;
	}
} // end class
?>